Great South Bay

Great South Bay, arm of the Atlantic Ocean, c.45 mi (72 km) long, between the southern shore of Long Island and offshore barrier islands, SE N.Y. With the rapid population growth along its shores, the shallow bay has suffered accelerated deposition, pollution, and rampant growth of eel grass. Environmental efforts have sought to eliminate these problems. Major recreation areas on the bay include Jones Beach State Park and Fire Island National Seashore.